After the mysterious deaths and suicides of Kyungsoo and his friends, his brother Kidoh comes to get his stuff from their house and he finds a file, containing weird documents and a music sheet with a strange melody written on it. He decides to produce the song in honour of his brother, but Xero get ambitious and steals the song. What he doesn't know is that when he sings it, he gives the ice demon Nix a perfect opportunity for another game of death. She possesses his body, but something goes wrong and she can't get out, not until Xero has fulfilled his task.